import json
import random
from datetime import datetime

from django.http import JsonResponse, HttpResponse
from django.shortcuts import render, redirect
from django.views.decorators.csrf import csrf_exempt

from app01 import models
from app01.utils.bootstrap import BootStrapModelForm
from app01.utils.pagination import Pagination


class OrderModelForm(BootStrapModelForm):
    class Meta:
        model = models.Order
        fields = ['title', 'price', 'status']


def order_list(request):
    """订单列表"""
    queryset = models.Order.objects.all().order_by('-id')
    page_object = Pagination(request, queryset)
    form = OrderModelForm()

    context = {
        'form': form,
        'queryset': page_object.page_queryset,  # 当前页的数据
        'page_string': page_object.html()  # 分页的html代码
    }

    return render(request, 'order_list.html', context)


@csrf_exempt
def order_add(request):
    """新建订单(Ajax请求)"""
    form = OrderModelForm(data=request.POST)
    if form.is_valid():
        # 订单号：额外增加一些不是用户输入的值
        form.instance.oid = datetime.now().strftime('%Y%m%d%H%M%S') + str(random.randint(1000, 9999))

        # 固定设置管理员id
        form.instance.admin_id = request.session['user_info']['id']

        form.save()
        # return HttpResponse(json.dumps({'status': True}))
        return JsonResponse({'status': True})
    return JsonResponse({'status': False, 'error': form.errors})


def order_delete(request):
    """删除订单"""
    uid = request.GET.get('uid')
    exists = models.Order.objects.filter(id=uid).exists()
    if not exists:
        return JsonResponse({'status': False, 'error': '删除失败，订单不存在'})
    models.Order.objects.filter(id=uid).delete()
    return JsonResponse({'status': True})


def order_detail(request):
    """根据ID获取订单详细"""
    uid = request.GET.get("uid")
    # row_object = models.Order.objects.filter(id=uid).first()
    # if not row_object:
    #     return JsonResponse({"status": False, "error": "数据不存在"})

    # # 从数据库中获取到一个对象 row_object
    # result = {
    #     "status": True,
    #     "data": {
    #         "title": row_object.title,
    #         "price": row_object.price,
    #         "status": row_object.status,
    #     }
    # }
    # return JsonResponse({"status": True, "data": result})

    row_dict = models.Order.objects.filter(id=uid).values('title', 'price', 'status').first()
    if not row_dict:
        return JsonResponse({"status": False, "error": "数据不存在"})

    # 从数据库中获取到一个对象 row_object
    result = {
        "status": True,
        "data": row_dict
    }
    return JsonResponse(result)

@csrf_exempt
def order_edit(request):
    """编辑订单"""
    uid = request.GET.get("uid")
    row_object = models.Order.objects.filter(id=uid).first()
    exists = models.Order.objects.filter(id=uid).exists()
    if not exists:
        return JsonResponse({'status': False, 'tips': '订单不存在'})

    form = OrderModelForm(data=request.POST, instance=row_object)
    if form.is_valid():
        form.save()
        return JsonResponse({"status":True})
    return JsonResponse({'status': False, 'error': form.errors})
